JP2006071694A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device capable of broadening the width of a second display panel up to almost the same order as that of a first display panel with regard to the display device in which the first display panel is connected with the outside of a flexible substrate, the second display panel is connected with the inside of an opening part of the flexible substrate and the respective display panels are disposed on both sides of a panel holder. <P>SOLUTION: In the display device, the first display panel 10 is connected with the outside of the flexible substrate 30, the second display panel 20 is connected with the inside of the opening part 32 of the flexible substrate 30, the respective display panels 10, 20 are disposed on both sides of the panel holder, electronic parts for driving the panels are mounted on the upper part and the lower part of the opening part 32 in the flexible substrate 30 and laying wiring parts 36a, 36b are disposed on left and right both sides of the opening part 32. Therein, a part or all of the laying wiring parts 36a, 36b are extended to the outer side of the panel holder to broaden the width of the opening part 32 and, thereby, the width of the second display panel may be broadened up to almost the same order as that of the first display panel. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a display device provided with display panels on both sides of a panel holder, and more specifically, to a technique for achieving a large display panel within a limited space of the panel holder.

  Taking a cellular phone as an example, most of recent foldable cellular phones are provided with display panels on the inner surface and the outer surface on the lid side. At present, most of the display panels are liquid crystal panels, but organic EL panels are also being put into practical use.

  In the case of a cellular phone application, various devices have been made because it is necessary to incorporate two display panels in the limited space. However, Patent Document 1 shares a flexible substrate for two display panels. Thus, it has been proposed to save space. This will be described with reference to FIGS.

  FIG. 5 shows a display panel assembly 1 for mobile phone use in which the main panel 10 and the sub panel 20 are connected to a single flexible substrate 30. In this example, both the main panel 10 and the sub panel 20 are liquid crystal panels, but the main panel 10 has a display capacity larger than that of the sub panel 20 and is disposed on the inner surface of the folding mobile phone. On the other hand, the sub-panel 20 having a small display capacity is arranged on the outer surface on the lid side for displaying icons such as a battery mark and an incoming call display mark.

  A connecting piece 31 connected to the terminal portion 11 of the main panel 10 is formed on one side of the outer edge side of the flexible substrate 30. An opening 32 that is slightly larger than the sub-panel 20 is formed in the substrate of the flexible substrate 30, and a connection piece connected to the terminal portion 21 of the sub-panel 20 on one side of the inner edge of the opening 32. 33 is formed.

  A display panel assembly 1 in which the main panel 10 is connected to the connection piece 31 outside the flexible substrate 30 and the sub-panel 20 is connected to the connection piece 33 within the opening 32 of the flexible substrate 30 is as shown in FIG. Mounted on the panel holder 40.

  The panel holder 40 includes panel support surfaces 41 and 42 on both sides thereof. FIG. 6 is a perspective view of the panel holder 40 as seen from the back side. The main panel 10 has already been attached to the panel support surface 41 on one front side, and the sub-panel 20 is now attached to the panel support surface 42 on the other back side. It shows the state to do.

  The panel support surface 42 is provided with a sub-panel housing portion 43 surrounded by a side frame 43a. The flexible substrate 30 is bent by approximately 180 ° and the sub-panel 20 is fitted into the sub-panel housing portion 43 as shown in FIG. This completes the assembly. As described above, the flexible panel 30 is shared by the main panel 10 and the sub-panel 20, and the sub-panel 20 is arranged in the flexible board 30, whereby space saving and thinning can be achieved.

  The main panel 10 and the sub panel 20 are usually fixed to the panel support surfaces 41 and 42 by a double-sided adhesive (adhesive) tape (not shown), but include a locking claw and a locking piece separately. Locking means may be used. When the liquid crystal panel is a transmissive or transflective type, a light guide plate 44 included in the backlight unit is arranged between the main panel 10 and the sub panel 20 as shown in FIG.

Japanese Patent Laying-Open No. 2003-295213 (FIG. 4)

  By the way, in the above conventional example, the opening 32 for arranging the sub-panel 20 is provided in the flexible substrate 30, and the area for forming the panel driving control circuit is cut accordingly, so that the remaining portion is filled up. It is necessary to design a control circuit using this.

  Therefore, as shown in FIG. 7, for example, electronic component mounting areas 35a and 35b for driving the panel are allocated to the upper and lower portions of the opening 32 of the flexible substrate 30, respectively, and the left and right sides of the opening 32 are arranged on the left and right sides. The lead wiring portions 36a and 36b connect the electronic components in the component mounting areas 35a and 35b.

  In the field of mobile phones, the sub-panel 20 is generally recognized as an auxiliary presence of the main panel 10, and even if the display capacity is small, it has not been a problem. Recently, however, the amount of information transmitted at one time is small. Due to the rapid increase, in some models, the sub-panel 20 is also required to have the same width as the main panel 10 and to increase its display capacity.

  However, in the case of the above conventional example, if the width of the sub-panel 20 is to be increased, the widths of the routing wiring portions 36a and 36b must be reduced accordingly. Therefore, there is a limit to increasing the width of the sub-panel 20. It cannot be at least as wide as the main panel 10.

  Accordingly, an object of the present invention is to connect one first display panel of the two display panels to the outside of the flexible substrate, and connect the other second display panel within the opening of the flexible substrate. In a display device in which panels are arranged on both sides of a panel holder, the width of the second display panel arranged in the opening of the flexible substrate can be increased to almost the same level as the first display panel.

  In order to solve the above-described problems, the present invention has first and second display panels each having a terminal portion, and an opening for arranging the panel in the substrate, and is provided on each side of the opening inner edge side and the substrate outer edge side. The panel holder includes a flexible substrate on which connection pieces for the terminal portion are formed and a panel holder having panel support surfaces on both sides, and the first display panel is connected to the connection piece on the outer edge side of the substrate. And the second display panel is connected to the connection piece on the inner edge side of the opening within the opening, and the other panel support of the panel holder via the bent portion of the flexible substrate. Panel driving electronic parts are mounted on the upper part of the opening (the connecting piece side of the outer edge of the board) and the lower part of the flexible board. In the display device in which the electronic component routing wiring portions are provided on both the left and right sides of the opening, a part or all of the routing wiring portion is projected to the outside of the panel holder. It is characterized by being bent at a substantially right angle and fixed to the side surface of the panel holder.

  In the present invention, in order to prevent the thickness of the entire apparatus from becoming bulky, it is preferable that the protruding width of the overhanging portion is equal to or less than the width of the side surface of the panel holder.

  According to the present invention, a part or all of the routing wiring portion existing on both the left and right sides of the opening portion of the flexible substrate is projected outside the panel holder, so that it is disposed in the opening portion of the flexible substrate. The width of the second display panel can be further increased.

  Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view showing a display panel assembly including a main panel and a sub panel, and corresponds to FIG. FIG. 2 is a rear view of the display device showing a state where the sub-panel is mounted on the panel holder, and corresponds to FIG. 3 and 4 are perspective views showing the main part of the present invention. It should be noted that the same reference numerals are used for portions that do not need to be changed from the conventional example described above.

  A display panel assembly 1A shown in FIG. 1 as an example of the present invention is for a cellular phone in which a main panel 10 and a sub panel 20 are connected to a single flexible substrate 30 as in the conventional example described above. Although the panel 10 and the sub panel 20 are liquid crystal panels, an organic EL panel may be used.

  A connection piece 31 is formed on one side of the outer edge side of the flexible substrate 30, and the terminal portion 11 of the main panel 10 is connected to the connection piece 31. An opening 32 that is slightly larger than the sub-panel 20 is formed in the substrate of the flexible substrate 30, and a connection piece 33 is formed on one side of the inner edge side of the opening 32. The sub panel 20 is disposed in the opening 32 and the terminal portion 21 is connected to the connection piece 33.

  This display panel assembly 1A is also attached to the panel holder 40 in the same manner as described with reference to FIG. FIG. 2 shows a state in which the sub-panel 20 is attached to the panel holder 40. As can be seen from FIG. 2, the left and right sides 30 a and 30 b of the flexible substrate 30 project outside the panel holder 40 in the present invention.

  Then, the routing wiring portions 36a and 36b are allocated to the overhanging portion (the overhanging portion), and the electronic component mounting regions 35a and 35b disposed on the upper portion (the side where the connection piece 31 is formed) and the lower portion of the opening portion 32, The electronic components in 35b are connected.

  In this manner, by arranging the routing wiring portions 36a and 36b outside the panel holder 40, the width of the opening 32 can be increased by that amount. Therefore, the main panel 10 and the sub panel 20 are compared in FIG. As can be seen, the width of the sub-panel 20 can be increased to about the width of the main panel 10.

  As shown in FIG. 4, the lead-out wiring portions 36a and 36b are finally bent at a substantially right angle and fixed to the side surface 45 of the panel holder 40 with a double-sided adhesive tape (not shown). At this time, the width (width of the overhanging portion) W1 of the routing wiring portions 36a, 36b is set to the width W2 of the side surface 45 so that the edges of the routing wiring portions 36a, 36b do not protrude from the side surface 45 to the main panel 10 side. The following (W1 ≦ W2) is preferable.

  As described above, the present invention has been described by taking as an example a display device for mobile phones in which the main panel and the sub panel are back-to-back with the panel holder interposed therebetween. However, the present invention uses two display panels as the back-to-back with the panel holder interposed therebetween. It can be used for all display devices.

The top view which shows an example of the display panel assembly used for the display apparatus of this invention. The rear view which shows the state which mounted | wore the panel holder with the said display panel assembly. The perspective view of FIG. The perspective view which shows the display apparatus by this invention finally assembled. The top view which shows an example of the display panel assembly used for the conventional display apparatus. The perspective view which shows the state which attaches a display panel assembly to a panel holder with the said conventional display apparatus. The rear view which shows the said conventional display apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1A Display panel assembly 10 Main panel 11 Terminal part 20 Sub panel 21 Terminal part 30 Flexible substrate 31, 33 Connection piece 32 Opening part 35a, 35b Electronic component mounting area 36a, 36b Lead wiring part 40 Panel holder 45 Side surface

Claims (2)

Both the first and second display panels each having a terminal portion, and an opening for arranging the panel in the substrate, and a connecting piece for the terminal portion is formed on each side of the opening inner edge side and the substrate outer edge side. Including a flexible substrate and a panel holder having panel support surfaces on both sides, wherein the first display panel is disposed on one panel support surface of the panel holder in a state of being connected to the connection piece on the outer edge side of the substrate, The second display panel is disposed on the other panel support surface of the panel holder through the bent portion of the flexible substrate in a state where the second display panel is connected to the connection piece on the inner edge side of the opening in the opening, Panel drive electronic components are mounted on the upper part of the opening (on the connection piece side of the outer edge of the substrate) and on the lower part, respectively, and the power supplies are mounted on the left and right sides of the opening. In the display device lead wiring of the part it is provided,
A display device characterized in that a part or all of the lead-out wiring portion is extended to the outside of the panel holder, and the extended portion is bent at a substantially right angle and fixed to a side surface of the panel holder.   The display device according to claim 1, wherein a protruding width of the projecting portion is equal to or less than a width of a side surface of the panel holder.

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